ConfigOverride.php

<?php

namespace Drupal\Core\Installer;

use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Config\ConfigFactoryOverrideInterface;
use Drupal\Core\Config\StorageInterface;
use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInjection\ServiceProviderInterface;

/**
 * Override configuration during the installer.
 */
class ConfigOverride implements ServiceProviderInterface, ConfigFactoryOverrideInterface {
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        // Register this class so that it can override configuration.
        $container->register('core.install_config_override', static::class)
            ->addTag('config.factory.override');
    }
    
    /**
     * {@inheritdoc}
     */
    public function loadOverrides($names) {
        $overrides = [];
        if (InstallerKernel::installationAttempted() && function_exists('drupal_install_profile_distribution_name')) {
            // Early in the installer the site name is unknown. In this case we need
            // to fallback to the distribution's name.
            $overrides['system.site'] = [
                'name' => drupal_install_profile_distribution_name(),
            ];
        }
        return $overrides;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheSuffix() {
        return 'core.install_config_override';
    }
    
    /**
     * {@inheritdoc}
     */
    public function createConfigObject($name, $collection = StorageInterface::DEFAULT_COLLECTION) {
        return NULL;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheableMetadata($name) {
        return new CacheableMetadata();
    }

}